Beater-roll.



.l. A. IVIUIR.

HEATER ROLL.

APPLICATION FILED JAN-9.1911- LQQSAWO Patented. May 8,1917;

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JAMES A. MUIR, OF MORRISTOWN', NEW JERSEY.

BEATER-ROLL.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed January 9, 1917. ,SerialNo. 141.381.

To all whom it may concern:

Be it known that I, JAMES A. MUIR, a citizen of the United States, and aresident of Morristown, in the county of Morris and State of New Jersey,have invented a new and Improved Beater-Roll, of which the following isa full, clear, and exact description.

The invention relates to paper pulp engines, and similar machines, andits ob ect is to provide a new and improved beater roll, which is simpleand durable in construction and arranged to securely hold the blades inposition and against bending, to permit convenient and quick replacingof a broken or otherwise injured blade by a new one, and to allow use ofthe blades until practically worn out down to the peripheral faces ofthe heads.

In order to accomplish the desired resul use is made of metallic headsheld on a beater roll shaft and provided on their peripheral faces withregistering dovetail grooves, blades having dovetail bases fitting thesaid grooves, wooden disks secured to the heads and having theirperipheral faces flush with the peripheral faces of the heads, woodenfillet bars extending between adjacent blades and fastened to the saiddisks, and sets of superimposed reinforcing strips arranged betweenadjacent blades and removably fastened on the said fillet bars to allowof removing the outermost strips on the wearing down of the blades. Apractical embodiment of the invention is represented in the accompanyingdrawings forming a part of this specification, in which similarcharacters of reference indicate corresponding parts in both views.

Figure 1 is a longitudinal section of the beater roll, on the line 11 ofFig. 2; and

Fig. 2 is an end elevation of the same on the line 2'2 of Fig. 1.

On the beater roll shaft 10 are keyed or otherwise secured a number ofmetallic heads 11 each provided at one side with a wooden support 12,preferably in the form of a disk fastened by bolts 13 or other fasteningdevices to the corresponding head 11. The peripheral face of eachsupport 12 is flush with the peripheral face of the corresponding head11 and the latter as well as the support 12 is provided with registeringdovetail grooves 14:, of which the dovetail grooves of the several headsand their supports 12 are in transverse alinement with each other. Intothe registering dovetail grooves 11 fit the base ends of beater rollblades 15 made wedge shape in cross section, as plainly indicated, inthe drawings, and projecting a desired distance beyond the peripheralfaces of the heads 11. In practice, the base ends of the blades 15fit-sm'lgly into the dovetail grooves 11 so as to securely hold theblades in position without any special fastening devices.

Between adjacent blades 15 is fitted a fillet bar 20 made of wood andresting on the peripheral faces of the heads :11 and their woodensupports 12. and the said fillet bar 20 is fastened by nails or otherfastening devices 21 to the wooden supports 12. The fillet bars 20extend the length of the blades 15 and on top of each fillet bar 20 isarranged a set of superimposed reinforcing strips 22 of wood andfastened by nails or other fastening devices 23 one to the other and thelowermost one onto the fillet bar 20. It will benoticed that thereinforcingstrips 22 extend to. within a short distance from the outerends of the blades 15 so as to strongly reinforce the said blades and toprevent the same from breaking. Vhen the blades are worn down then theoutermost reinforcin stri 22 of each set of reinforcin permitting usingup of the blades 15 until within a short distance of the peripheralfaces of the heads 11.

When the beater roll is in use and any one of the blades 15 shouldbecome broken or otherwise injured then it can be readily drivenendwise'out of position in the heads 11 and replaced by anew one withoutdisturbing any of the other blades or the adjacent fillet bars 20 andsuperimposed sets of reinforcing strips 22.

The beater roll shown and described is very simple and durable inconstruction and can be cheaply manufactured.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A beater roll, comprising a shaft provided withheads having registering dovetail grooves, beater blades having dovetailbases fitting the said grooves, wooden sup- 10 fastened to the saidheads and having ports fastened to the sides of the said heads, filletbars fitting between the blades and fastened to thesald supports, andreinforcing strips fitting'between adjacent blades and re- 5 movitblyattached to the said bars."

2, A beater roll, comprising a shaft provided with beads havingregistering dovetail grooves, beater blades having dovetail basesfitting the said grooves, Wooden disks their peripheral faces flush withthe peripheral Lamaze faces of the said heads, fillet bars eachfitwermost of each set of

